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session.go
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session.go
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package frontend
import (
"net/http"
"github.com/gorilla/securecookie"
"github.com/gorilla/sessions"
"go.uber.org/zap"
"encoding/base64"
"strings"
"net/url"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/auth"
"github.com/pydio/cells/common/config"
"github.com/pydio/cells/common/log"
)
const (
SessionTimeoutMinutes = 24
)
var sessionStore *sessions.CookieStore
func GetSessionStore() sessions.Store {
if sessionStore == nil {
val := config.Get("frontend", "session", "secureKey").String("")
var key []byte
if val == "" {
key = securecookie.GenerateRandomKey(64)
val = base64.StdEncoding.EncodeToString(key)
config.Set(val, "frontend", "session", "secureKey")
config.Save(common.PYDIO_SYSTEM_USERNAME, "Generating session random key")
} else {
key, _ = base64.StdEncoding.DecodeString(val)
}
sessionStore = sessions.NewCookieStore([]byte(val))
sessionStore.Options = &sessions.Options{
Path: "/a/frontend",
MaxAge: 60 * SessionTimeoutMinutes,
HttpOnly: true,
}
if config.Get("cert", "proxy", "ssl").Bool(false) {
sessionStore.Options.Secure = true
}
urlVal := config.Get("defaults", "url").String("")
if parsed, e := url.Parse(urlVal); e == nil {
sessionStore.Options.Domain = strings.Split(parsed.Host, ":")[0]
}
}
return sessionStore
}
// NewSessionWrapper creates a Http middleware checking if a cookie is passed
// along and if this cookie contains a proper JWT.
// The excludes parameter may be used to namely ignore specific "METHOD:/URI“ for this check.
func NewSessionWrapper(h http.Handler, excludes ...string) http.Handler {
jwtVerifier := auth.DefaultJWTVerifier()
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
for _, excluded := range excludes {
split := strings.Split(excluded, ":")
method := split[0]
uri := split[1]
if strings.ToLower(method) == strings.ToLower(r.Method) && strings.HasPrefix(r.RequestURI, uri) {
log.Logger(r.Context()).Debug("Skipping session wrapper by exclusion:" + excluded)
h.ServeHTTP(w, r)
return
}
}
sessionName := "pydio"
if h, ok := r.Header["X-Pydio-Minisite"]; ok {
sessionName = sessionName + "-" + strings.Join(h, "")
}
session, err := GetSessionStore().Get(r, sessionName)
if err != nil && !strings.Contains(err.Error(), "securecookie: the value is not valid") {
log.Logger(r.Context()).Error("Cannot retrieve session", zap.Error(err))
}
//log.Logger(r.Context()).Info("Loading session name", zap.String("s", sessionName), zap.Any("jwt", session.Values["jwt"]))
if value, ok := session.Values["jwt"]; ok {
ctx := r.Context()
ctx, _, err = jwtVerifier.Verify(ctx, value.(string))
if err != nil {
// If it is expired, may be it will be refreshed after so do not remove it from session
if !strings.Contains(err.Error(), "token is expired") {
// There is something wrong. Silently remove it from session
delete(session.Values, "jwt")
session.Save(r, w)
}
} else {
log.Logger(ctx).Debug("Found token in session " + sessionName)
// Update context
r = r.WithContext(ctx)
}
}
h.ServeHTTP(w, r)
})
}